MC button OnPress1/OnPress2 *help*

Hello and happy new year to you all…
I have a question, and I hope someone can help.

I’m trying to build a drop down menu using fuse kit.
I somewhat understand the fuse kit, or the stuff I need to
alpha ,slide, tween and the whatnots.

But what I need help to is this,
I have a menu button, (button_mc) press it once and the sub menu appears
Press it again and the sub menu disappears

But how do I write the code.
So It will work?

button_mc.onPress1 = function() {
Some code that make the menu appear
}
button_mc.onPress2 = function() {
Some code that make the menu disappear

Hope some on can help out, cheers.
dondeigo